Albert Einstein reportedly called compound interest the 8th wonder of the world. After seeing the numbers below, you'll understand why.
The Startling Example
Consider two investors — Ananya and Ravi:
- Ananya starts SIP of ₹1,000/month at age 22. Invests for 10 years (₹1.2L total), then stops. Money stays invested.
- Ravi starts SIP of ₹1,000/month at age 32. Invests until age 60 (28 years, ₹3.36L total). Never stops.
Ananya invested 65% less money but ended up with 45% more. This is the power of compounding — time in the market matters more than amount invested.
The Rule of 72
A quick mental math trick: divide 72 by your annual return rate to find how many years it takes to double your money.
- PPF at 7.1% → 72 ÷ 7.1 = 10.1 years to double
- SIP at 12% → 72 ÷ 12 = 6 years to double
- SIP at 15% → 72 ÷ 15 = 4.8 years to double
How Compounding Actually Works
In year 1, your ₹5,000/month SIP earns returns on ₹60,000. In year 10, it's earning returns on ₹8-10 lakhs. In year 20, it's earning returns on ₹30-40 lakhs. The base keeps growing — and returns are earned on an ever-larger base. This is why the last 5 years of a 25-year SIP create more wealth than the first 15 years combined.
Compounding is simple: your returns earn returns. The longer you give it, the more violent the growth becomes in the later years.
The Cost of Waiting
Every year you delay starting a SIP has a compounding cost. Delaying a ₹5,000/month SIP by just 5 years (starting at 30 vs 25) at 12% over 30 years reduces your final corpus by approximately ₹45 Lakhs. That's the price of 5 years of procrastination.
Start Now — Even Small
The best time to start investing was yesterday. The second best time is today. Even ₹500/month started at 22 creates more wealth than ₹5,000/month started at 40. Start small, start today, and let compounding do the heavy lifting for you.
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